WN3555
WN3555 (Southwest Airlines) is a multi-stop service on 27 routes, busiest New York to Houston. Of 451 departures recorded from October 2024 to July 2026, 76.3% left on time, according to the US BTS.
- On-time departures76.3%of 451 flights
- Average delay12.1 min
- July 202645▲ 45.2%vs July 2025
- Cancelled0.9%
- Legs flown under this number27
Recorded departures by month
All legs under this number combined; see the leg table.
The most recent periods19 periods
| Period | Departures 2025 | Departures 2026 | Change vs last year |
|---|---|---|---|
| January | 2 | 2 | 0.0% |
| February | 12 | 3 | ▼ 75.0% |
| March | 3 | 27 | ▲ 800.0% |
| April | 27 | 30 | ▲ 11.1% |
| May | 41 | 31 | ▼ 24.4% |
| June | 29 | 41 | ▲ 41.4% |
| July | 31 | 45 | ▲ 45.2% |
| August | 39 | – | – |
| September | 38 | – | – |
| October | 1 | – | in progress |
| November | 15 | – | – |
| December | 16 | – | – |
| Year to date (Jan–Jul) | 145 | 179 | ▲ 23.4% |
according to the US BTS · October 2024 → July 2026
On-time departures by month
On time = departure within 15 minutes of schedule. Non-cancelled flights with a recorded delay only.
The most recent periods19 periods
| Period | On time 2025 | On time 2026 | Change vs last year |
|---|---|---|---|
| January | 100.0% | 100.0% | 0.0% |
| February | 66.7% | 100.0% | ▲ 50.0% |
| March | 100.0% | 100.0% | 0.0% |
| April | 51.9% | 90.0% | ▲ 73.6% |
| May | 63.4% | 83.9% | ▲ 32.3% |
| June | 41.4% | 85.0% | ▲ 105.4% |
| July | 66.7% | 95.6% | ▲ 43.3% |
| August | 76.9% | – | – |
| September | 84.2% | – | – |
| October | 100.0% | – | in progress |
| November | 53.3% | – | – |
| December | 75.0% | – | – |
| Year-to-date average (Jan–Jul) | 70.0% | 93.5% | ▲ 33.6% |
according to the US BTS · October 2024 → July 2026
Average departure delay by month
according to the US BTS · October 2024 → July 2026
Cancelled departures by month
The most recent periods19 periods
| Period | Cancelled 2025 | Cancelled 2026 | Change vs last year |
|---|---|---|---|
| January | 0 | 0 | – |
| February | 0 | 0 | – |
| March | 0 | 2 | – |
| April | 0 | 0 | – |
| May | 0 | 0 | – |
| June | 0 | 1 | – |
| July | 1 | 0 | ▼ 100.0% |
| August | 0 | – | – |
| September | 0 | – | – |
| October | 0 | – | in progress |
| November | 0 | – | – |
| December | 0 | – | – |
| Year to date (Jan–Jul) | 1 | 3 | ▲ 200.0% |
according to the US BTS · October 2024 → July 2026
This is a historical record of departures already flown, not a forecast for your flight.
Several legs: the headline figure averages all of them. See the leg table.
Cancellation share
- Not cancelled 99.1% 447
- Cancelled 0.9% 4
Share of all recorded flights in the period, all legs. · Oct 13, 2024 → Jul 31, 2026
On time, leg by leg
Departures within 15 minutes of schedule; small figure = departures recorded.
Legs flown under this number
7| Routes | Distance (km) | Avg delay | On time | Departures |
|---|---|---|---|---|
| LGA HOU LaGuardia Airport – William P. Hobby Airport | 2,295 | 31.7 min | 55.0% | 61 |
| PDX SAN Portland International Airport – San Diego International Airport | 1,503 | 4.5 min | 86.2% | 58 |
| SAN TUS San Diego International Airport – Tucson International Airport | 591 | 3.8 min | 89.8% | 49 |
| LAS BUR Harry Reid International Airport – Hollywood Burbank/Bob Hope Airport | 359 | 25.4 min | 53.9% | 39 |
| SMF SAN Sacramento International Airport – San Diego International Airport | 773 | 3.4 min | 90.9% | 34 |
| DSM DEN Des Moines International Airport – Denver International Airport | 947 | -3.5 min | 100.0% | 33 |
| MCI SAN Kansas City International Airport – San Diego International Airport | 2,142 | 8.2 min | 81.3% | 32 |
Monthly figures
| Period | Departures | With departure delay recorded | On time | Cancelled |
|---|---|---|---|---|
| October 2024 | 13 | 13 | 69.2% | 0 |
| November 2024 | 3 | 3 | 66.7% | 0 |
| December 2024 | 2 | 2 | 100.0% | 0 |
| January 2025 | 2 | 2 | 100.0% | 0 |
| February 2025 | 12 | 12 | 66.7% | 0 |
| March 2025 | 3 | 3 | 100.0% | 0 |
| April 2025 | 27 | 27 | 51.9% | 0 |
| May 2025 | 41 | 41 | 63.4% | 0 |
| June 2025 | 29 | 29 | 41.4% | 0 |
| July 2025 | 31 | 30 | 66.7% | 1 |
| August 2025 | 39 | 39 | 76.9% | 0 |
| September 2025 | 38 | 38 | 84.2% | 0 |
| October 2025 | 1 | 1 | 100.0% | 0 |
| November 2025 | 15 | 15 | 53.3% | 0 |
| December 2025 | 16 | 16 | 75.0% | 0 |
| January 2026 | 2 | 2 | 100.0% | 0 |
| February 2026 | 3 | 3 | 100.0% | 0 |
| March 2026 | 27 | 25 | 100.0% | 2 |
| April 2026 | 30 | 30 | 90.0% | 0 |
| May 2026 | 31 | 31 | 83.9% | 0 |
| June 2026 | 41 | 40 | 85.0% | 1 |
| July 2026 | 45 | 45 | 95.6% | 0 |